<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function getMax(arr) {
            let max = arr[0]
            for (let i = 1; i <= arr.length; i++) {
                if (max < arr[i]) {
                    max = arr[i]
                }
            }
            return max
        }
        let arr=[1,3,4,6,7,9,0,11,2,3,6,33,55,22,3333]
        let max = getMax(arr)
        document.write(`最大数是${max}`)
    </script>
</body>

</html>